Smarchbme, who calls his stunning creation the “Smarch Watch,” said it took him a few weeks to build the fully-functional, self-coded device, which boasts a battery life of seven days and takes just 2.5 hours to fully recharge (because of course he went the whole hog and built a charging cradle, too). The watch brings up color-coded notifications from his phone, including messages, email and calendar, although he humbly states there’s “no music playback yet.”

He sourced his materials as cheaply as possible, with a final price tag of about $50. However, he says that “as a rule of thumb, for a product to be successful and make a profit, you would have to sell it for four or five times the cost of the goods. So in my case (assuming no discounts due to the economies of scale) I would have to charge somewhere between $200 and $250 to make a profit.” This goes some way to explaining why companies charge such high prices, then. Alas, despite repeated requests by impressed Redditors, Smarchbme has no plans to put his creation into wider production. But he’s shared everything — and we mean everything — you need to know to get started yourself is here.

Admittedly, Smarchbme had a few things stacked in his favor, such as his five years working as a product designer and access to equipment such as a 3D printer. But he says that “We live in the golden age of making — there’s no better time than now to start making things,” adding that “You can DIY anything — next up, a DIY spaceship.”